Quote from: sidehack on January 03, 2016, 08:11:29 PM

433MHz at 0.8V is probably about 3A per stick, so your hub is pushing 30W internally. Try setting the sticks to about 740mV and 300MHz, which should draw something like 6.8W per stick; four would then be about 27W total. See if it'll keep up. If you can, plug up first one stick, then two, then three, then four; after each stick, measure the 5V coming out of the hub ports and see if it's starting to drop. If you don't have an inline meter, use the meter you use to check core voltage and measure across the outside two pins on the USB plug.

I split and rigged up an old USB cable to the leads on my DMM to check the hub voltage. With no sticks I get 5.28V volts at the end near the power source and it gradually drops to 5.26V on the other end. I set the sticks all at 740mV and cgminer at 300 MHz. After plugging one stick in there was no drop in voltage on any of the other ports. Same thing for sticks 2, 3, and when I plug in 4 I do see a drop form 5.26 to 5.24 on the last port. I start to get HW errors though on any one of the sticks 1-3 when I plug in the 4th. After that they start to reset and I end up with duplicate dead compacs in the list. I repeated this process and stepped down the clockrate to 295, 285, 280, and still got major errors on only one device, and it's a different one (different port location and stick) each time I do the trial. At 275MHz it works great with no errors, the limit seems to be identical to when the pot was set lower at 700MHz. I guess my hub's power is limited to whatever it takes to run four sticks at 275MHz. I don't want to buy any more hubs so I guess I'll stick to 275MHz for 12 miners at ~182GH/s (was hoping to tinker and break 200 GH/s with my current setup). Upping the voltage to 740mV did fix the issue I had with the single miner giving HW errors.

Deezil

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